//===----------------------------------------------------------------------===//
#include "llvm/Support/Compression.h"
-#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Config/config.h"
+#include "llvm/Support/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/MemoryBuffer.h"
#if LLVM_ENABLE_ZLIB == 1 && HAVE_ZLIB_H
#include <zlib.h>
#endif
using namespace llvm;
-#if LLVM_ENABLE_ZLIB == 1
+#if LLVM_ENABLE_ZLIB == 1 && HAVE_LIBZ
static int encodeZlibCompressionLevel(zlib::CompressionLevel Level) {
switch (Level) {
case zlib::NoCompression: return 0;
case zlib::DefaultCompression: return Z_DEFAULT_COMPRESSION;
case zlib::BestSizeCompression: return 9;
}
+ llvm_unreachable("Invalid zlib::CompressionLevel!");
}
static zlib::Status encodeZlibReturnValue(int ReturnValue) {
bool zlib::isAvailable() { return true; }
zlib::Status zlib::compress(StringRef InputBuffer,
- OwningPtr<MemoryBuffer> &CompressedBuffer,
+ SmallVectorImpl<char> &CompressedBuffer,
CompressionLevel Level) {
unsigned long CompressedSize = ::compressBound(InputBuffer.size());
- OwningArrayPtr<char> TmpBuffer(new char[CompressedSize]);
+ CompressedBuffer.resize(CompressedSize);
int CLevel = encodeZlibCompressionLevel(Level);
Status Res = encodeZlibReturnValue(::compress2(
- (Bytef *)TmpBuffer.get(), &CompressedSize,
+ (Bytef *)CompressedBuffer.data(), &CompressedSize,
(const Bytef *)InputBuffer.data(), InputBuffer.size(), CLevel));
- if (Res == StatusOK)
- CompressedBuffer.reset(MemoryBuffer::getMemBufferCopy(
- StringRef(TmpBuffer.get(), CompressedSize)));
+ CompressedBuffer.resize(CompressedSize);
return Res;
}
zlib::Status zlib::uncompress(StringRef InputBuffer,
- OwningPtr<MemoryBuffer> &UncompressedBuffer,
+ SmallVectorImpl<char> &UncompressedBuffer,
size_t UncompressedSize) {
- OwningArrayPtr<char> TmpBuffer(new char[UncompressedSize]);
- Status Res = encodeZlibReturnValue(
- ::uncompress((Bytef *)TmpBuffer.get(), (uLongf *)&UncompressedSize,
- (const Bytef *)InputBuffer.data(), InputBuffer.size()));
- if (Res == StatusOK)
- UncompressedBuffer.reset(MemoryBuffer::getMemBufferCopy(
- StringRef(TmpBuffer.get(), UncompressedSize)));
+ UncompressedBuffer.resize(UncompressedSize);
+ Status Res = encodeZlibReturnValue(::uncompress(
+ (Bytef *)UncompressedBuffer.data(), (uLongf *)&UncompressedSize,
+ (const Bytef *)InputBuffer.data(), InputBuffer.size()));
+ UncompressedBuffer.resize(UncompressedSize);
return Res;
}
+uint32_t zlib::crc32(StringRef Buffer) {
+ return ::crc32(0, (const Bytef *)Buffer.data(), Buffer.size());
+}
+
#else
bool zlib::isAvailable() { return false; }
zlib::Status zlib::compress(StringRef InputBuffer,
- OwningPtr<MemoryBuffer> &CompressedBuffer,
+ SmallVectorImpl<char> &CompressedBuffer,
CompressionLevel Level) {
return zlib::StatusUnsupported;
}
zlib::Status zlib::uncompress(StringRef InputBuffer,
- OwningPtr<MemoryBuffer> &UncompressedBuffer,
+ SmallVectorImpl<char> &UncompressedBuffer,
size_t UncompressedSize) {
return zlib::StatusUnsupported;
}
+uint32_t zlib::crc32(StringRef Buffer) {
+ llvm_unreachable("zlib::crc32 is unavailable");
+}
#endif